Most wars feel far away. This one is about to show up in your daily life. Oil has quietly jumped around 20 percent this month, and on Tuesday it hit a five-week high, with Brent crude pushing near 91 US dollars a barrel. That is not just a number on a trader's screen. It is the price of nearly everything you touch, because oil moves the trucks, the ships and the factories behind your groceries, your deliveries and the fuel in your tank.

The trigger is a conflict that keeps escalating. The United States and Iran have been trading strikes for a tenth straight day, Iran has hit targets in Kuwait, Bahrain and Jordan, and the fragile ceasefire that markets were counting on has fallen apart. Every time the fighting spreads, traders bid oil higher, bracing for the supply of the world's most important commodity to be choked off.

Here is why this particular week has markets on edge. The one backup route that was keeping oil flowing is now under direct threat. To understand why that matters, you need to understand a stretch of water most people have never heard of.

Picture a sea lane so narrow you could almost see across it, yet so important that the entire global economy leans on it. That is the Strait of Hormuz. Before this war, roughly one in every five barrels of oil on earth sailed through it. When a passage that busy turns dangerous, the whole world feels the squeeze.

That is exactly what has happened. Tanker traffic through Hormuz has thinned dramatically as attacks on ships pile up. Supertanker crossings recently fell to about two a day, down from eight just weeks earlier. Fewer ships moving oil means less crude reaching buyers, and less supply almost always means higher prices. This is the oldest rule in markets, and right now it is working against consumers everywhere.

Saudi Arabia, the giant of global oil, saw this coming. So it leaned on a clever escape hatch, a way to get its crude out to the world without ever touching the dangerous strait. For a while, it worked. Then this week, that escape hatch became the next target.

Saudi Arabia's escape hatch runs across the desert. It pumps oil through a massive pipeline to a port on the Red Sea called Yanbu, on the opposite side of the country from the Strait of Hormuz. From there, tankers slip out through a second narrow gateway at the bottom of the Red Sea and off to buyers in Asia. As Hormuz grew too risky, Saudi Arabia pushed record volumes of crude out through this route instead. It was the pressure valve keeping the market from panicking.

On Monday, that valve got attacked. Yemen's Houthi rebels, who are backed by Iran, declared a full naval blockade on Saudi Arabia. They emailed shipping companies with a blunt warning, telling them not to load or unload cargo at Saudi ports or risk being hit anywhere they sailed. This was not an empty threat. Within hours, two enormous tankers carrying Saudi oil bound for China and India made sudden U-turns in the Red Sea and fled toward the Suez Canal.

Think about what that means. The main route out is dangerous. Now the backup route is dangerous too. When both exits from a burning building are blocked at once, the fear stops being about today's price and starts being about how bad this could get.

When oil climbs, it does not stop at the petrol station. It seeps into the cost of shipping, manufacturing, food and travel, a slow burn that economists call cost-push inflation. In plain terms, when it costs more to move and make things, those higher costs eventually land on you at the checkout. That is why central banks watch oil so nervously. A sudden spike can undo months of hard work on bringing prices back down.

The scary part is how much higher this could go. Goldman Sachs has warned Brent could reach 120 US dollars a barrel if the Hormuz disruption drags on. And in the darkest scenario, where both the strait and the Red Sea route are shut at the same time, some analysts see oil pushing past 150. For context, that kind of move would echo the energy shocks that have historically dragged whole economies into recession.

It is not all one way, though, and this is where staying calm pays off. OPEC and its allies are already raising output to add more oil to the market, mediators are pushing a possible ten-day ceasefire, and prices have run so hot that traders now call oil overbought, meaning it is stretched and vulnerable to a sharp pullback if tensions cool. The same headlines that can send prices to 120 could also crack the moment peace looks real. That two-sided risk is exactly what makes this moment so tense.

With 20 years of investment expertise, Caleb Gan is a seasoned professional in stock trading. The hard work and dedication were recognized when his partner and him were featured on Singapore TV Channel 9's MoneyWeek, a prominent financial program. He's also had the privilege to share insights on radio stations like 93.8Live, Capital 95.8FM, and 96.3FM through live interviews about stock market investments. Beyond that, he's also the co-founder of NDU System, where he continues to help others navigate the world of trading.

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